CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
PREMIUMS EARNED AND OTHER REVENUES
Direct premiums written	$ 334,553	$ 289,234
Change in unearned premium	(8,602)	6,143
Direct premium earned	325,951	295,377
Ceded premium earned	(105,122)	(85,650)
Premiums earned, net	220,829	209,727
Net investment income	6,834	8,142
Net realized gains (losses) on investments	299	(11,525)
Net change in unrealized gains (losses) of equity securities	(8,024)	18,032
Commission revenue	7,015	5,505
Policy fees	5,540	5,021
Other revenue	2,782	1,684
Total premiums earned and other revenues	235,275	236,586
OPERATING COSTS AND EXPENSES
Losses and loss adjustment expenses	135,048	113,094
General and administrative expenses	72,643	69,748
Total operating costs and expenses	207,691	182,842
INCOME BEFORE INCOME TAXES	27,584	53,744
Income tax expense	7,517	13,596
NET INCOME	$ 20,067	$ 40,148
Basic earnings per common share (in dollars per share)	$ 0.62	$ 1.16
Weighted average common shares outstanding - Basic (in shares)	32,591	34,741
Diluted earnings per common share (in dollars per share)	$ 0.61	$ 1.14
Weighted average common shares outstanding - Diluted (in shares)	32,731	35,206
Cash dividend declared per common share (in dollars per share)	$ 0.16	$ 0.16